參數(shù)資料
型號(hào)： NCP1523
廠商： Texas Instruments, Inc.
英文描述： 6-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans
中文描述： 6甲，2.2 V至5.5 V輸入，非隔離，寬輸出，可調(diào)電源模塊的TurboTrans
文件頁(yè)數(shù)： 18/35頁(yè)
文件大?。?/td> 1128K
代理商： NCP1523
www.ti.com
C Capacitance
μ
F
T
40
30
20
4
5
4
3
1
9
3
2
5
4
7
6
8
2
10
9
6
5
8
7
PTH04T231 Type A
Ceramic Capacitors
Without TurboTrans
With TurboTrans
C Capacitance
μ
F
T
40
30
20
4
5
4
3
1
9
3
2
5
4
7
6
8
2
10
6
5
8
7
9
PTH04T231 Type A
Ceramic Capacitors
Without TurboTrans
With TurboTrans
R
TT
40
1
C
O
1500
C
O
300
1
k
(2)
PTH04T230W, PTH04T231W
SLTS271A–SEPTEMBER 2006–REVISED OCTOBER 2006
PTH04T231W - Type A Ceramic Capacitors
5-V Input
3.3-V Input
Figure 10. Capacitor Type A, 100 < C(
μ
F) x ESR(m
)
≤
1000
(e.g. Ceramic)
Figure 11. Capacitor Type A, 100 < C(
μ
F) x ESR(m
)
≤
1000
(e.g. Ceramic)
Table 4. Type A TurboTrans C
O
Values and Required R
TT
Selection Table
Transient Voltage Deviation (mV)
5-V Input
3.3-V input
C
R
C
R
25% load step
(1.5 A)
50% load step
(3 A)
75% load step
(4.5 A)
Minimum
Required Output
Capacitance (
μ
F)
300
320
400
510
700
1050
3300
Required
TurboTrans
Resistor (k
)
open
549
93.1
37.4
15.8
4.75
short
Minimum
Required Output
Capacitance (
μ
F)
300
300
350
450
610
920
2250
Required
TurboTrans
Resistor (k
)
open
open
226
59.0
22.6
7.50
short
40
35
30
25
20
15
10
80
70
60
50
40
30
20
120
105
90
75
60
45
30
R
TT
Resistor Selection
The TurboTrans resistor value, R
TT
can be determined from the TurboTrans programming equation:
Where C
O
is the total output capacitance in
μ
F. C
O
values greater than or equal to 1500
μ
F require R
TT
to
be a short, 0
.
To ensure stability, a minimum amount of output capacitance is required for a given R
resistor value. The
value of R
TT
must be calculated using the minimum required output capacitance determined from the
capacitor transient response charts above.
18
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